Nembrotha guttata Yonow, 1994 Nembrotha yonowae is a species of colourful sea slug, a dorid nudibranch, a marine gastropod mollusk in the family Polyceridae.

[1][2] This species is known from the western Indo-Pacific Ocean, including the Maldives, the Philippines and Indonesia.

[3] Nembrotha yonowae is a large black nembrothid that grows to at least 95 mm in length.

The rhinophores and gills are black, edged in orange.

Nembrotha yonowae eats colonial ascidians.